Addresses”10-14Unassigned15ReservedHeader Length:Necessary to specify where the header ends and begins, since the Options bit area is of variable length.Type Of Service:Contains flags for Delay, Throughput, Reliability, and Cost, which make routing possible.Total Length:The length of the IP datagram.Flags:These flags are for “Fragment” or “Don’t Fragment.” Allows or prevents breaking up of IP packets.Fragment Offset:Controls the defragmentation the IP packet.Time To Live:The TTL flag accounts for a packet’s mortality. Each hop the packet experiences reduces the TTL flag by one. Upon reaching 0, a packet is dropped. Protocol:The two most common are UDP and TCP.Header checksum:Data integrity.Source Address:Source of the datagramDestination Address:Intended recipient of the datagram.Options:Variable length items such as security, source route, record route, and timestamp.Data:Variable length- the content of the datagram.The version 6 header looks like this:The IP6 header is somewhat minimalist in comparison to the IP4 header, but the new features are these:Priority:Permits administration of many packets from the same source based on “priority,” based on this scale:0Uncharacterized Traffic1Filler Traffic [news, banners, etc.]2Unattended data transfer [e-mail]3Reserved4Unattended Bulk Transfer [FTP, NFS, CODA]5Reserved6Interactive traffic [Telnet, Archie]7Internet Control Traffic [routing, SNMP]8-15Used for prioritization from a source that transmits without specifying Priorities. Currently no recommendations.Flow Label:An experimental attempt at sending datagrams with preferred routes.Payload Length:Specifies the length of the datagram itself, not including the header.Hop Limit:TTL with a more direct name.Source Address:128 bit specification of source.Destination Address:128 bit...
